1 /* bind.c - ldap backend bind function */
4 * Copyright 1998-2003 The OpenLDAP Foundation, All Rights Reserved.
5 * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
7 /* This is an altered version */
9 * Copyright 1999, Howard Chu, All rights reserved. <hyc@highlandsun.com>
11 * Permission is granted to anyone to use this software for any purpose
12 * on any computer system, and to alter it and redistribute it, subject
13 * to the following restrictions:
15 * 1. The author is not responsible for the consequences of use of this
16 * software, no matter how awful, even if they arise from flaws in it.
18 * 2. The origin of this software must not be misrepresented, either by
19 * explicit claim or by omission. Since few users ever read sources,
20 * credits should appear in the documentation.
22 * 3. Altered versions must be plainly marked as such, and must not be
23 * misrepresented as being the original software. Since few users
24 * ever read sources, credits should appear in the documentation.
26 * 4. This notice may not be removed or altered.
30 * Copyright 2000, Pierangelo Masarati, All rights reserved. <ando@sys-net.it>
32 * This software is being modified by Pierangelo Masarati.
33 * The previously reported conditions apply to the modified code as well.
34 * Changes in the original code are highlighted where required.
35 * Credits for the original code go to the author, Howard Chu.
42 #include <ac/socket.h>
43 #include <ac/string.h>
48 #include "back-ldap.h"
50 #define PRINT_CONNTREE 0
52 static LDAP_REBIND_PROC ldap_back_rebind;
59 struct ldapinfo *li = (struct ldapinfo *) op->o_bd->be_private;
62 struct berval mdn = { 0, NULL };
66 lc = ldap_back_getconn(li, op, rs);
72 * Rewrite the bind dn if needed
75 switch ( rewrite_session( li->rwinfo, "bindDn",
77 op->o_conn, &mdn.bv_val ) ) {
78 case REWRITE_REGEXEC_OK:
79 if ( mdn.bv_val == NULL ) {
82 mdn.bv_len = strlen( mdn.bv_val );
86 LDAP_LOG( BACK_LDAP, DETAIL1,
87 "[rw] bindDn: \"%s\" -> \"%s\"\n",
88 op->o_req_dn.bv_val, mdn.bv_val, 0 );
89 #else /* !NEW_LOGGING */
90 Debug( LDAP_DEBUG_ARGS, "rw> bindDn: \"%s\" -> \"%s\"\n",
91 op->o_req_dn.bv_val, mdn.bv_val, 0 );
92 #endif /* !NEW_LOGGING */
95 case REWRITE_REGEXEC_UNWILLING:
96 send_ldap_error( op, rs, LDAP_UNWILLING_TO_PERFORM,
97 "Operation not allowed" );
100 case REWRITE_REGEXEC_ERR:
101 send_ldap_error( op, rs, LDAP_OTHER,
105 #else /* !ENABLE_REWRITE */
106 ldap_back_dn_massage( li, &op->o_req_dn, &mdn, 0, 1 );
107 #endif /* !ENABLE_REWRITE */
109 if ( lc->bound_dn.bv_val ) {
110 ch_free( lc->bound_dn.bv_val );
111 lc->bound_dn.bv_len = 0;
112 lc->bound_dn.bv_val = NULL;
115 /* method is always LDAP_AUTH_SIMPLE if we got here */
116 rc = ldap_sasl_bind(lc->ld, mdn.bv_val, LDAP_SASL_SIMPLE,
117 &op->oq_bind.rb_cred, op->o_ctrls, NULL, &msgid);
118 rc = ldap_back_op_result( li, lc, op, rs, msgid, rc, 1 );
119 if (rc == LDAP_SUCCESS) {
121 if ( mdn.bv_val != op->o_req_dn.bv_val ) {
124 ber_dupbv( &lc->bound_dn, &op->o_req_dn );
126 if ( li->savecred ) {
127 if ( lc->cred.bv_val )
128 ch_free( lc->cred.bv_val );
129 ber_dupbv( &lc->cred, &op->oq_bind.rb_cred );
130 ldap_set_rebind_proc( lc->ld, ldap_back_rebind, lc );
134 /* must re-insert if local DN changed as result of bind */
135 if ( lc->bound && !bvmatch(&op->o_req_ndn, &lc->local_dn ) ) {
138 ldap_pvt_thread_mutex_lock( &li->conn_mutex );
139 lc = avl_delete( &li->conntree, (caddr_t)lc,
140 ldap_back_conn_cmp );
141 if ( lc->local_dn.bv_val )
142 ch_free( lc->local_dn.bv_val );
143 ber_dupbv( &lc->local_dn, &op->o_req_ndn );
144 lerr = avl_insert( &li->conntree, (caddr_t)lc,
145 ldap_back_conn_cmp, ldap_back_conn_dup );
146 ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
148 ldap_back_conn_free( lc );
158 * compares two struct ldapconn based on the value of the conn pointer;
167 const struct ldapconn *lc1 = (const struct ldapconn *)c1;
168 const struct ldapconn *lc2 = (const struct ldapconn *)c2;
171 /* If local DNs don't match, it is definitely not a match */
172 if ( ( rc = ber_bvcmp( &lc1->local_dn, &lc2->local_dn )) )
175 /* For shared sessions, conn is NULL. Only explicitly
176 * bound sessions will have non-NULL conn.
178 return lc1->conn - lc2->conn;
184 * returns -1 in case a duplicate struct ldapconn has been inserted;
193 struct ldapconn *lc1 = (struct ldapconn *)c1;
194 struct ldapconn *lc2 = (struct ldapconn *)c2;
196 /* Cannot have more than one shared session with same DN */
197 if ( dn_match( &lc1->local_dn, &lc2->local_dn ) &&
198 lc1->conn == lc2->conn ) return -1;
203 #if PRINT_CONNTREE > 0
204 static void ravl_print( Avlnode *root, int depth )
212 ravl_print( root->avl_right, depth+1 );
214 for ( i = 0; i < depth; i++ )
218 printf( "lc(%lx) local(%s) conn(%lx) %d\n",
219 lc, lc->local_dn.bv_val, lc->conn, root->avl_bf );
221 ravl_print( root->avl_left, depth+1 );
224 static void myprint( Avlnode *root )
226 printf( "********\n" );
229 printf( "\tNULL\n" );
232 ravl_print( root, 0 );
234 printf( "********\n" );
236 #endif /* PRINT_CONNTREE */
239 ldap_back_getconn(struct ldapinfo *li, Operation *op, SlapReply *rs)
241 struct ldapconn *lc, lc_curr;
246 * The local DN is the op->o_req_ndn if binding, otherwise
247 * it's the op->o_conn->c_ndn
249 struct berval *cdn = &op->o_conn->c_ndn;
251 /* Searches for a ldapconn in the avl tree */
253 /* Explicit binds must not be shared */
254 if ( op->o_tag == LDAP_REQ_BIND ) {
255 lc_curr.conn = op->o_conn;
256 cdn = &op->o_req_ndn;
258 } else if ( op->o_conn->c_ndn.bv_len ) {
259 lc_curr.conn = op->o_conn;
265 /* Internal searches are privileged. So is root. */
266 if ( op->o_do_not_cache || be_isroot( li->be, &op->o_ndn ) ) {
267 lc_curr.local_dn = li->be->be_rootndn;
270 lc_curr.local_dn = *cdn;
272 ldap_pvt_thread_mutex_lock( &li->conn_mutex );
273 lc = (struct ldapconn *)avl_find( li->conntree,
274 (caddr_t)&lc_curr, ldap_back_conn_cmp );
275 ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
277 /* Looks like we didn't get a bind. Open a new session... */
279 int vers = op->o_conn->c_protocol;
280 rs->sr_err = ldap_initialize(&ld, li->url);
282 if (rs->sr_err != LDAP_SUCCESS) {
283 rs->sr_err = ldap_back_map_result(rs->sr_err);
284 rs->sr_text = "ldap_initialize() failed";
285 send_ldap_result( op, rs );
288 /* Set LDAP version. This will always succeed: If the client
289 * bound with a particular version, then so can we.
291 ldap_set_option(ld, LDAP_OPT_PROTOCOL_VERSION,
292 (const void *)&vers);
293 /* FIXME: configurable? */
294 ldap_set_option(ld, LDAP_OPT_REFERRALS, LDAP_OPT_ON);
296 lc = (struct ldapconn *)ch_malloc(sizeof(struct ldapconn));
297 lc->conn = lc_curr.conn;
299 ber_dupbv( &lc->local_dn, &lc_curr.local_dn );
302 ber_dupbv( &lc->cred, &li->bindpw );
305 lc->cred.bv_val = NULL;
308 ldap_pvt_thread_mutex_init( &lc->lc_mutex );
310 #ifdef ENABLE_REWRITE
312 * Sets a cookie for the rewrite session
314 * FIXME: the o_conn might be no longer valid,
315 * since we may have different entries
316 * for the same connection
318 ( void )rewrite_session_init( li->rwinfo, op->o_conn );
319 #endif /* ENABLE_REWRITE */
321 if ( !is_priv && op->o_conn->c_dn.bv_len != 0 ) {
324 * Rewrite the bind dn if needed
326 #ifdef ENABLE_REWRITE
327 lc->bound_dn.bv_val = NULL;
328 lc->bound_dn.bv_len = 0;
329 switch ( rewrite_session( li->rwinfo, "bindDn",
330 op->o_conn->c_dn.bv_val,
332 &lc->bound_dn.bv_val ) ) {
333 case REWRITE_REGEXEC_OK:
334 if ( lc->bound_dn.bv_val == NULL ) {
335 ber_dupbv( &lc->bound_dn,
338 lc->bound_dn.bv_len = strlen( lc->bound_dn.bv_val );
341 LDAP_LOG( BACK_LDAP, DETAIL1,
342 "[rw] bindDn: \"%s\" ->"
344 op->o_conn->c_dn.bv_val,
345 lc->bound_dn.bv_val, 0 );
346 #else /* !NEW_LOGGING */
347 Debug( LDAP_DEBUG_ARGS,
348 "rw> bindDn: \"%s\" ->"
350 op->o_conn->c_dn.bv_val,
351 lc->bound_dn.bv_val, 0 );
352 #endif /* !NEW_LOGGING */
355 case REWRITE_REGEXEC_UNWILLING:
356 send_ldap_error( op, rs,
357 LDAP_UNWILLING_TO_PERFORM,
358 "Operation not allowed" );
361 case REWRITE_REGEXEC_ERR:
362 send_ldap_error( op, rs,
368 #else /* !ENABLE_REWRITE */
370 ldap_back_dn_massage( li, &op->o_conn->c_dn, &bv, 0, 1 );
371 if ( bv.bv_val == op->o_conn->c_dn.bv_val ) {
372 ber_dupbv( &lc->bound_dn, &bv );
376 #endif /* !ENABLE_REWRITE */
379 lc->bound_dn.bv_val = NULL;
380 lc->bound_dn.bv_len = 0;
384 /* Inserts the newly created ldapconn in the avl tree */
385 ldap_pvt_thread_mutex_lock( &li->conn_mutex );
386 rs->sr_err = avl_insert( &li->conntree, (caddr_t)lc,
387 ldap_back_conn_cmp, ldap_back_conn_dup );
389 #if PRINT_CONNTREE > 0
390 myprint( li->conntree );
391 #endif /* PRINT_CONNTREE */
393 ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
396 LDAP_LOG( BACK_LDAP, INFO,
397 "ldap_back_getconn: conn %lx inserted\n", lc, 0, 0);
398 #else /* !NEW_LOGGING */
399 Debug( LDAP_DEBUG_TRACE,
400 "=>ldap_back_getconn: conn %lx inserted\n", lc, 0, 0 );
401 #endif /* !NEW_LOGGING */
403 /* Err could be -1 in case a duplicate ldapconn is inserted */
404 if ( rs->sr_err != 0 ) {
405 ldap_back_conn_free( lc );
406 send_ldap_error( op, rs, LDAP_OTHER,
407 "internal server error" );
412 LDAP_LOG( BACK_LDAP, INFO,
413 "ldap_back_getconn: conn %lx fetched\n",
415 #else /* !NEW_LOGGING */
416 Debug( LDAP_DEBUG_TRACE,
417 "=>ldap_back_getconn: conn %lx fetched\n", lc, 0, 0 );
418 #endif /* !NEW_LOGGING */
427 * Note: as the check for the value of lc->bound was already here, I removed
428 * it from all the callers, and I made the function return the flag, so
429 * it can be used to simplify the check.
432 ldap_back_dobind( struct ldapinfo *li, struct ldapconn *lc, Operation *op, SlapReply *rs )
437 ldap_pvt_thread_mutex_lock( &lc->lc_mutex );
439 rc = ldap_sasl_bind(lc->ld, lc->bound_dn.bv_val,
440 LDAP_SASL_SIMPLE, &lc->cred, NULL, NULL, &msgid);
441 rc = ldap_back_op_result( li, lc, op, rs, msgid, rc, 0 );
442 if (rc == LDAP_SUCCESS) {
447 ldap_pvt_thread_mutex_unlock( &lc->lc_mutex );
454 * This is a callback used for chasing referrals using the same
455 * credentials as the original user on this session.
458 ldap_back_rebind( LDAP *ld, LDAP_CONST char *url, ber_tag_t request,
459 ber_int_t msgid, void *params )
461 struct ldapconn *lc = params;
463 return ldap_bind_s( ld, lc->bound_dn.bv_val, lc->cred.bv_val, LDAP_AUTH_SIMPLE );
466 /* Map API errors to protocol errors... */
469 ldap_back_map_result(int err)
473 case LDAP_SERVER_DOWN:
474 return LDAP_UNAVAILABLE;
475 case LDAP_LOCAL_ERROR:
477 case LDAP_ENCODING_ERROR:
478 case LDAP_DECODING_ERROR:
479 return LDAP_PROTOCOL_ERROR;
481 return LDAP_UNAVAILABLE;
482 case LDAP_AUTH_UNKNOWN:
483 return LDAP_AUTH_METHOD_NOT_SUPPORTED;
484 case LDAP_FILTER_ERROR:
486 case LDAP_USER_CANCELLED:
488 case LDAP_PARAM_ERROR:
489 return LDAP_PROTOCOL_ERROR;
492 case LDAP_CONNECT_ERROR:
493 return LDAP_UNAVAILABLE;
494 case LDAP_NOT_SUPPORTED:
495 return LDAP_UNWILLING_TO_PERFORM;
496 case LDAP_CONTROL_NOT_FOUND:
497 return LDAP_PROTOCOL_ERROR;
498 case LDAP_NO_RESULTS_RETURNED:
499 return LDAP_NO_SUCH_OBJECT;
500 case LDAP_MORE_RESULTS_TO_RETURN:
502 case LDAP_CLIENT_LOOP:
503 case LDAP_REFERRAL_LIMIT_EXCEEDED:
504 return LDAP_LOOP_DETECT;
506 if LDAP_API_ERROR(err)
514 ldap_back_op_result(struct ldapinfo *li, struct ldapconn *lc,
515 Operation *op, SlapReply *rs, ber_int_t msgid, int err, int sendok)
522 rs->sr_matched = NULL;
524 if (err == LDAP_SUCCESS) {
525 if (ldap_result(lc->ld, msgid, 1, NULL, &res) == -1) {
526 ldap_get_option(lc->ld, LDAP_OPT_ERROR_NUMBER, &err);
528 rc = ldap_parse_result(lc->ld, res, &err, &match,
529 (char **)&rs->sr_text, NULL, NULL, 1);
530 if (rc != LDAP_SUCCESS) err = rc;
533 if (err != LDAP_SUCCESS) {
534 err = ldap_back_map_result(err);
536 /* internal ops must not reply to client */
537 if ( op->o_conn && !op->o_do_not_cache ) {
538 #ifdef ENABLE_REWRITE
541 switch(rewrite_session(li->rwinfo, "matchedDn", match, op->o_conn,
542 (char **)&rs->sr_matched)) {
543 case REWRITE_REGEXEC_OK:
544 if (!rs->sr_matched) rs->sr_matched = match; break;
545 case REWRITE_REGEXEC_UNWILLING:
546 case REWRITE_REGEXEC_ERR:
551 struct berval dn, mdn;
553 ber_str2bv(match, 0, 0, &dn);
554 ldap_back_dn_massage(li, &dn, &mdn, 0, 0);
555 rs->sr_matched = mdn.bv_val;
560 if (sendok || err != LDAP_SUCCESS) {
562 send_ldap_result( op, rs );
564 if (rs->sr_matched != match) free((char *)rs->sr_matched);
565 rs->sr_matched = NULL;
566 if ( match ) ldap_memfree( match );
568 ldap_memfree( (char *)rs->sr_text );
571 return( (err==LDAP_SUCCESS) ? 0 : -1 );